CN116552279A - Electric vehicle charging method and device based on charging port temperature and electric vehicle - Google Patents

Electric vehicle charging method and device based on charging port temperature and electric vehicle Download PDF

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Publication number
CN116552279A
CN116552279A CN202310615874.7A CN202310615874A CN116552279A CN 116552279 A CN116552279 A CN 116552279A CN 202310615874 A CN202310615874 A CN 202310615874A CN 116552279 A CN116552279 A CN 116552279A
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CN
China
Prior art keywords
charging
electric automobile
temperature
charged
stage
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Pending
Application number
CN202310615874.7A
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Chinese (zh)
Inventor
曹鸿圣
彭江
陈轶
黄大飞
刘小飞
许�鹏
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Chongqing Selis Phoenix Intelligent Innovation Technology Co ltd
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Chengdu Seres Technology Co Ltd
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Priority to CN202310615874.7A priority Critical patent/CN116552279A/en
Publication of CN116552279A publication Critical patent/CN116552279A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/16—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated by remote control, i.e. initiating means not mounted on vehicle
    • B60T7/18—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger operated by remote control, i.e. initiating means not mounted on vehicle operated by wayside apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application provides an electric automobile charging method and device based on charging port temperature and an electric automobile. The method comprises the following steps: when the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to park through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are arranged on the electric automobile; judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port; carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage; and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller. By adopting the technical means, the problem that potential safety hazards exist in charging of the electric automobile in the prior art is solved.

Description

Electric vehicle charging method and device based on charging port temperature and electric vehicle
Technical Field
The application relates to the technical field of new energy automobiles, in particular to an electric automobile charging method and device based on charging port temperature and an electric automobile.
Background
The existing charging protection function of the electric automobile is mostly aimed at batteries, such as over-temperature protection and over-current protection of the batteries, and the over-temperature protection of charging ports is rarely achieved. The charging port is a connector, so that the connector is easy to wear, the contact surface is possibly damaged by arc discharge during charging or discharging, the resistance can be increased after the damage, and the temperature can be increased after the resistance is increased. In addition, the contact failure causes the resistance of the contact surface to become large, resulting in an increase in the temperature of the charging port. The existing common electric automobile charging method has the hidden troubles of scalding and even igniting of personnel caused by the fact that the temperature of a charging port is too high in the charging process.
Disclosure of Invention
In view of this, the embodiment of the application provides an electric automobile charging method and device based on charging port temperature and an electric automobile, so as to solve the problem that in the prior art, the charging port temperature is too high to cause various hidden dangers in electric automobile charging.
In a first aspect of the embodiments of the present application, there is provided an electric vehicle charging method based on a charging port temperature, including: when the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to park through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are arranged on the electric automobile; judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port; carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage; and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller.
In a second aspect of the embodiments of the present application, there is provided an electric vehicle charging device based on a charging port temperature, including: the first detection module is configured to control the electric automobile to park through the electronic parking system under the condition that the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile; the judging module is configured to judge whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; a determining module configured to detect a charging port temperature by a temperature sensor provided on the charging port and determine a current limit value for each charging stage based on the charging port temperature when it is determined that the electric vehicle is permitted to be charged; the charging module is configured to charge the electric automobile in multiple steps comprising a plurality of charging stages according to the current limit value of each charging stage; and the second detection module is configured to detect and judge whether the electric automobile is charged or not in real time through the automobile body controller.
In a third aspect of the embodiments of the present application, an electric vehicle is provided, which includes a memory, a main control module, and a computer program stored in the memory and capable of running on the main control module, where the main control module implements the steps of the method as described above when executing the computer program.
Compared with the prior art, the beneficial effects of the embodiment of the application at least comprise: when the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to park through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are arranged on the electric automobile; judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port; carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage; and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller. According to the embodiment of the application, the electric automobile is charged in multiple steps based on the temperature of the charging port, so that the problem that various hidden dangers are caused by overhigh temperature of the charging port in the charging process of the electric automobile in the prior art can be solved by adopting the technical means, and the hidden dangers caused by overhigh temperature of the charging port in the charging process of the electric automobile are avoided, so that the charging safety of the electric automobile is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an electric vehicle charging method based on a charging port temperature according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a multi-step charging method in dc charging according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electric vehicle charging device based on a charging port temperature according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electric vehicle according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
Fig. 1 is a schematic flow chart of an electric vehicle charging method based on a charging port temperature according to an embodiment of the present application. The charging method of the electric vehicle based on the charging port temperature of fig. 1 may be performed by a main control module provided on the electric vehicle. Alternatively, the electric vehicle charging method based on the charging port temperature of fig. 1 may be executed by a computer or a server, or software on the computer or the server. Taking a main control module as an execution main body as an example, the electric automobile charging method based on the charging port temperature comprises the following steps:
s101, controlling the electric automobile to park through an electronic parking system under the condition that the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile;
s102, judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked;
s103, when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port;
s104, carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage;
s105, detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller.
It should be noted that the main control module may be VCU (Vehicle Control Unit), and the vehicle body controller may be BCM (Body Control Module). The vehicle-mounted charger may be an OBC (On-board charger). The electric automobile is also provided with a vehicle-mounted screen and a remote communication terminal. The telecommunication terminal is a TBOX, i.e. a Telematics Box. Each charging stage corresponds to a fault, when the VDC is in each charging stage, a corresponding fault alarm is sent out, and when the vehicle-mounted screen receives the over-temperature fault alarm of the VDC, the vehicle-mounted screen prompts the charging port over-temperature fault and the current limit value of the charging stage through prompt tones and popup windows. The TBOX receives the over-temperature fault alarm through can communication, transmits fault prompt information to the mobile phone terminal through the cloud, and prompts the over-temperature fault of the charging port and the current limit value of the charging stage through prompt tones and popup windows.
When any of the following faults is not detected and the electric vehicle is not in any of the following states, judging that the electric vehicle is allowed to be charged comprises: a fault, comprising: insulation failure, communication loss failure, and high voltage interlock failure; the state of the electric automobile includes: the electric automobile is used as a tractor to pull the motor home, and the electric automobile is in maintenance or OTA upgrading.
Specifically: under the condition that the charging gun is inserted into the charging port is detected, judging whether the speed of the electric automobile is smaller than or equal to a preset speed, if so, controlling the electric automobile to park through the electronic parking system, otherwise, not parking the electric automobile. And when various faults and any one of various states of the electric automobile are not detected, judging that the electric automobile is allowed to be charged, and otherwise, judging that the electric automobile is not allowed to be charged. When the electric automobile is allowed to be charged, the temperature of the charging port is detected, the current limit value of each charging stage is determined based on the temperature of the charging port, and then the electric automobile is subjected to multi-step charging. The battery state of the electric automobile is detected in real time through the automobile body controller, and whether the electric automobile is charged or not is judged based on the battery state. For example, the electric vehicle is determined to be charged completely when the battery state is full, and the electric vehicle is determined to be charged incompletely when the battery state is not full.
The insulation fault refers to short circuit of a high-voltage loop of the electric automobile, wherein the high-voltage loop is a circuit consisting of a power battery, a high-voltage accessory, a driving motor and a generator, and the high-voltage accessory is provided with an air conditioner, a thermosensitive device, a high-voltage-to-low-voltage device and the like; the communication loss fault refers to the communication message loss between the VCU and the OBC and BMS; the high-voltage interlocking fault means that the high-voltage loop cannot be safely communicated; OTA is a space downloading technology (English full name: over the Air Technology), and OTA upgrading is that an electric automobile is in a state of upgrading software.
According to the technical scheme provided by the embodiment of the application, when the charging gun is detected to be inserted into the charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to park through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile; judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port; carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage; and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller. According to the embodiment of the application, the electric automobile is charged in multiple steps based on the temperature of the charging port, so that the problem that various hidden dangers are caused by overhigh temperature of the charging port in the charging process of the electric automobile in the prior art can be solved by adopting the technical means, and the hidden dangers caused by overhigh temperature of the charging port in the charging process of the electric automobile are avoided, so that the charging safety of the electric automobile is improved.
Further, determining a current limit for each charging phase based on the charging port temperature includes: when the electric automobile is subjected to alternating current charging: when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile; when the temperature of the charging port is larger than or equal to a first threshold value and smaller than a second threshold value, and the duration of the temperature of the charging port in the first threshold value and the duration of the temperature of the charging port in the second threshold value are larger than a preset duration, determining that the charging of the electric automobile is in a second charging stage, and determining that the current limit value of the second charging stage is a first current value; and when the temperature of the charging port is greater than or equal to a second threshold value and the duration time of the temperature of the charging port is greater than or equal to the second threshold value is greater than a preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining that the current limit value of the third charging stage is a second current value.
When an electric vehicle is ac charged, the current limit for each charging stage in the multi-step charge is a constant. For example, the temperature of the charging port is represented by T, the first threshold is 85 ℃, the second threshold is 105 ℃, and the preset time period is 4s. When T is less than 85 ℃, the electric automobile is in a first charging stage, and the current limit value is the maximum charging current allowed by the electric automobile; when the temperature T is more than or equal to 105 ℃ and is more than or equal to 85 ℃ and the duration time of the temperature T is more than or equal to 105 ℃ and is more than 4s, the electric automobile is in a second charging stage, the first current value is 16A, and the VDC sends out I-level over-temperature fault warning; when T is more than or equal to 105 ℃ and the duration time of T is more than or equal to 105 ℃ is more than 4s, the electric automobile is in a third charging stage, the second current value is 0A, and the VDC sends out a II-level over-temperature fault alarm.
Further, according to the current limit value of each charging stage, the electric automobile is charged in a multi-step mode comprising a plurality of charging stages, and the method comprises the following steps: when the electric automobile is subjected to alternating current charging: when the charging of the electric automobile is in the first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile; when the electric vehicle is charged in the second charging stage, charging the electric vehicle according to the first current value, and adjusting the charging of the electric vehicle from the second charging stage to the first charging stage under the condition that the duration time of the charging port temperature being smaller than the third threshold value is longer than the preset duration time; when the electric vehicle is charged in the third charging stage, the electric vehicle is charged according to the second current value, and the charging of the electric vehicle is adjusted from the third charging stage to the second charging stage under the condition that the duration time of the charging port temperature being smaller than the fourth threshold value is longer than the preset duration time.
For example, the temperature of the charging port is represented by T, the first threshold is 85 ℃, the second threshold is 105 ℃, the preset time period is 4s, the third threshold is 80 ℃, the fourth threshold is 100 ℃, the first current value is 16A, and the second current value is 0A. Then when T is less than 85 ℃, the electric automobile is in a first charging stage, and the electric automobile is charged according to the maximum charging current allowed by the electric automobile; when the temperature of 105 ℃ is more than or equal to 85 ℃ and the duration of 105 ℃ is more than or equal to 85 ℃ is more than 4s, the electric automobile is in a second charging stage, the electric automobile is charged according to 16A (namely, the current in the second charging stage is 16A at maximum), the VDC sends out I-stage over-temperature fault alarm, and when the duration of T <80 ℃ is more than 4s, the electric automobile exits from the second charging stage to charge in the first charging stage; when T is more than or equal to 105 ℃ and the duration time of T is more than or equal to 105 ℃ is more than 4s, the electric automobile is in a third charging stage, the electric automobile is charged according to 0A (namely the current in the third charging stage is 0A at maximum), the VDC gives out a II-stage over-temperature fault alarm, and when T is more than 4s and less than 100 ℃, the electric automobile exits from a second charging stage, and the electric automobile is charged in the first charging stage.
Further, determining a current limit for each charging phase based on the charging port temperature includes: when the electric automobile is charged by direct current: when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile; when the temperature of the charging port is larger than or equal to a first threshold value and smaller than a second threshold value, and the duration of the temperature of the charging port in the first threshold value and the duration of the temperature of the charging port in the second threshold value are larger than a preset duration, determining that the charging of the electric automobile is in a second charging stage, and determining a current limit value of the second charging stage through a first function; and when the temperature of the charging port is greater than or equal to a second threshold value and the duration time of the temperature of the charging port is greater than or equal to the second threshold value is greater than a preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining a current limit value of the third charging stage through a second function.
A first function: i1 =im-k 1×t;
im is the maximum charging current allowed by the electric automobile, k1 is a first slope, I1 is a current limit value determined by a first function, and T is the charging port temperature;
the second function: i2 =im-k 2 x T;
k2 is the second slope, I2 is the current limit determined by the second function, k2> k1.
When the electric vehicle is charged by direct current, the current limit value of each charging stage in the multi-step charging is a variable that varies with the temperature of the charging port. For example, the temperature of the charging port is represented by T, the first threshold is 85 ℃, the second threshold is 105 ℃, the preset time period is 4s, and the maximum charging current allowed by the electric automobile is 420A. Then when T is less than 85 ℃, the electric automobile is in the first charging stage, and the current limit value is 420A; when the temperature T is more than or equal to 105 ℃ and is more than or equal to 85 ℃ and the duration time of the temperature T is more than or equal to 105 ℃ and is more than 4s, the electric automobile is in a second charging stage, the current limit value is I1, and the VDC sends out I-level over-temperature fault warning; when T is more than or equal to 105 ℃ and the duration time of T is more than or equal to 105 ℃ is more than 4s, the electric automobile is in a third charging stage, the current limit value is I2, and the VDC gives out a II-stage over-temperature fault alarm.
Fig. 2 is a schematic flow chart of a multi-step charging method in dc charging according to an embodiment of the present application, as shown in fig. 2, including:
s201, when the charging of the electric automobile is in a first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile;
s202, when the electric automobile is charged in a second charging stage, charging the electric automobile according to the current limit value determined by the first function;
s203, when the duration time that the temperature of the charging port is smaller than the third threshold value is longer than the preset duration time, charging the electric automobile from the second charging stage to the first charging stage;
s204, when the electric automobile is charged in a third charging stage, charging the electric automobile according to the current limit value determined by the second function;
and S205, when the duration that the temperature of the charging port is smaller than the fourth threshold value is longer than the preset duration, charging the electric automobile from the third charging stage to the second charging stage.
For example, the temperature of the charging port is represented by T, the first threshold is 85 ℃, the second threshold is 105 ℃, the preset time period is 4s, the third threshold is 80 ℃, the fourth threshold is 100 ℃, the current limit value of the second charging stage is I1, the current limit value of the third charging stage is I2, and the maximum charging current allowed by the electric automobile is 420A. Then when T is less than 85 ℃, the electric automobile is in a first charging stage, and the electric automobile is charged according to 420A; when the temperature T is more than or equal to 105 ℃ and the duration time of the temperature T is more than or equal to 85 ℃ and is more than 4s, the electric automobile is in a second charging stage, the electric automobile is charged according to I1, the VDC gives out a I-stage over-temperature fault alarm, and when the duration time T is more than 4s and is less than 80 ℃, the electric automobile exits from the second charging stage, and the electric automobile is charged in a first charging stage; when T is more than or equal to 105 ℃ and the duration time of T is more than or equal to 105 ℃ is more than 4s, the electric automobile is in a third charging stage, the electric automobile is charged according to I2, the VDC sends out a II-stage over-temperature fault alarm, and when T is more than 4s and less than 100 ℃, the electric automobile exits from the second charging stage, and the electric automobile is charged in the first charging stage.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Fig. 3 is a schematic diagram of an electric vehicle charging device based on a charging port temperature according to an embodiment of the present application. As shown in fig. 3, the electric vehicle charging device based on the charging port temperature includes:
the first detection module 301 is configured to control the electric vehicle to park through the electronic parking system when the charging gun is detected to be inserted into the charging port of the electric vehicle through the vehicle-mounted charger, wherein the vehicle-mounted charger, the electronic parking system and the vehicle body controller are all arranged on the electric vehicle;
a judging module 302 configured to judge whether the electric vehicle is allowed to be charged in a case where the electric vehicle is parked;
a determining module 303 configured to detect a charging port temperature by a temperature sensor provided on the charging port and determine a current limit value for each charging stage based on the charging port temperature when it is determined that the electric vehicle is permitted to be charged;
a charging module 304 configured to charge the electric vehicle in multiple steps including a plurality of charging phases according to a current limit value of each charging phase;
the second detection module 305 is configured to detect and determine whether the electric vehicle is charged in real time by the vehicle body controller.
According to the technical scheme provided by the embodiment of the application, when the charging gun is detected to be inserted into the charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to park through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile; judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked; when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port; carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage; and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller. According to the embodiment of the application, the electric automobile is charged in multiple steps based on the temperature of the charging port, so that the problem that various hidden dangers are caused by overhigh temperature of the charging port in the charging process of the electric automobile in the prior art can be solved by adopting the technical means, and the hidden dangers caused by overhigh temperature of the charging port in the charging process of the electric automobile are avoided, so that the charging safety of the electric automobile is improved.
Optionally, the determining module 303 is further configured to, when the electric vehicle is being ac charged: when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile; when the temperature of the charging port is larger than or equal to a first threshold value and smaller than a second threshold value, and the duration of the temperature of the charging port in the first threshold value and the duration of the temperature of the charging port in the second threshold value are larger than a preset duration, determining that the charging of the electric automobile is in a second charging stage, and determining that the current limit value of the second charging stage is a first current value; and when the temperature of the charging port is greater than or equal to a second threshold value and the duration time of the temperature of the charging port is greater than or equal to the second threshold value is greater than a preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining that the current limit value of the third charging stage is a second current value.
Optionally, the charging module 304 is further configured to, when the electric vehicle is being ac charged: when the charging of the electric automobile is in the first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile; when the electric vehicle is charged in the second charging stage, charging the electric vehicle according to the first current value, and adjusting the charging of the electric vehicle from the second charging stage to the first charging stage under the condition that the duration time of the charging port temperature being smaller than the third threshold value is longer than the preset duration time; when the electric vehicle is charged in the third charging stage, the electric vehicle is charged according to the second current value, and the charging of the electric vehicle is adjusted from the third charging stage to the second charging stage under the condition that the duration time of the charging port temperature being smaller than the fourth threshold value is longer than the preset duration time.
Optionally, the determining module 303 is further configured to, when the electric vehicle is charged by direct current: when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile; when the temperature of the charging port is larger than or equal to a first threshold value and smaller than a second threshold value, and the duration of the temperature of the charging port in the first threshold value and the duration of the temperature of the charging port in the second threshold value are larger than a preset duration, determining that the charging of the electric automobile is in a second charging stage, and determining a current limit value of the second charging stage through a first function; and when the temperature of the charging port is greater than or equal to a second threshold value and the duration time of the temperature of the charging port is greater than or equal to the second threshold value is greater than a preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining a current limit value of the third charging stage through a second function.
A first function: i1 =im-k 1×t;
im is the maximum charging current allowed by the electric automobile, k1 is a first slope, I1 is a current limit value determined by a first function, and T is the charging port temperature;
the second function: i2 =im-k 2 x T;
k2 is the second slope, I2 is the current limit determined by the second function, k2> k1.
Optionally, the charging module 304 is further configured to, when the electric vehicle is charged by direct current: when the charging of the electric automobile is in the first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile; when the electric vehicle is charged in the second charging stage, charging the electric vehicle according to the current limit value determined by the first function; when the duration time that the temperature of the charging port is smaller than the third threshold value is longer than the preset duration time, charging the electric automobile from the second charging stage to the first charging stage; when the electric vehicle is charged in the third charging stage, charging the electric vehicle according to the current limit value determined by the second function; and when the duration that the temperature of the charging port is smaller than the fourth threshold value is longer than the preset duration, charging the electric automobile from the third charging stage to the second charging stage.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
Fig. 4 is a schematic view of an electric vehicle 4 provided in an embodiment of the present disclosure. As shown in fig. 4, the electric vehicle 4 of this embodiment includes: a main control module 401, a memory 402 and a computer program 403 stored in the memory 402 and executable on the main control module 401. The main control module 401, when executing the computer program 403, implements the steps in the above-described method embodiments. Alternatively, the main control module 401 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 403.
The electric vehicle 4 may include, but is not limited to, a main control module 401 and a memory 402. It will be appreciated by those skilled in the art that fig. 4 is merely an example of an electric vehicle 4 and is not limiting of the electric vehicle 4 and may include more or fewer components than shown, or different components.
The main control module 401 may be VCU (Vehicle Control Unit), and the memory 402 may be an internal storage unit of the electric vehicle 4, for example, a hard disk or a memory of the electric vehicle 4. The memory 402 may also be an external storage device of the electric vehicle 4, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electric vehicle 4. The memory 402 may also include both internal storage units and external storage devices of the electric vehicle 4. The memory 402 is used to store computer programs and other programs and data required for the electric vehicle.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the foregoing embodiment, or may be implemented by implementing relevant hardware by using a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each embodiment of the foregoing method when executed by the main control module. The computer program may comprise computer program code, which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. An electric automobile charging method based on charging port temperature is characterized by comprising the following steps:
when the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, the electric automobile is controlled to be parked through the electronic parking system, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile;
judging whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked;
when the electric automobile is judged to be allowed to be charged, detecting the temperature of a charging port through a temperature sensor arranged on the charging port, and determining the current limit value of each charging stage based on the temperature of the charging port;
carrying out multi-step charging comprising a plurality of charging stages on the electric automobile according to the current limit value of each charging stage;
and detecting and judging whether the electric automobile is charged or not in real time through the automobile body controller.
2. The method of claim 1, wherein determining a current limit for each charging phase based on the charging port temperature comprises:
when the electric vehicle is subjected to alternating-current charging:
when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile;
when the charging port temperature is greater than or equal to the first threshold value but less than a second threshold value, and the duration of the charging port temperature in the first threshold value and the second threshold value is greater than a preset duration, determining that charging of the electric automobile is in a second charging stage, and determining that a current limit value of the second charging stage is a first current value;
and when the charging port temperature is greater than or equal to the second threshold value and the duration time of the charging port temperature which is greater than or equal to the second threshold value is greater than the preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining that the current limit value of the third charging stage is a second current value.
3. The method of claim 1, wherein charging the electric vehicle in multiple steps including multiple charging phases according to the current limit for each charging phase, comprises:
when the electric vehicle is subjected to alternating-current charging:
when the charging of the electric automobile is in a first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile;
when the electric vehicle is charged in a second charging stage, charging the electric vehicle according to a first current value, and adjusting the charging of the electric vehicle from the second charging stage to the first charging stage under the condition that the duration of the charging port temperature being smaller than a third threshold value is longer than a preset duration;
when the electric vehicle is charged in a third charging stage, the electric vehicle is charged according to a second current value, and the charging of the electric vehicle is adjusted from the third charging stage to the second charging stage under the condition that the duration of the charging port temperature being smaller than a fourth threshold value is longer than the preset duration.
4. The method of claim 1, wherein determining a current limit for each charging phase based on the charging port temperature comprises:
when the electric automobile is charged by direct current:
when the temperature of the charging port is smaller than a first threshold value, determining that the charging of the electric automobile is in a first charging stage, and determining that the current limit value of the first charging stage is the maximum charging current allowed by the electric automobile;
when the charging port temperature is greater than or equal to the first threshold value but less than a second threshold value, and the duration of the charging port temperature in the first threshold value and the second threshold value is greater than a preset duration, determining that charging of the electric automobile is in a second charging stage, and determining a current limit value of the second charging stage through a first function;
and when the temperature of the charging port is greater than or equal to the second threshold value and the duration time of the temperature of the charging port is greater than or equal to the second threshold value and is greater than the preset duration time, determining that the electric vehicle is charged in a third charging stage, and determining a current limit value of the third charging stage through a second function.
5. The method of claim 1, wherein charging the electric vehicle in multiple steps including multiple charging phases according to the current limit for each charging phase, comprises:
when the electric automobile is charged by direct current:
when the charging of the electric automobile is in a first charging stage, charging the electric automobile according to the maximum charging current allowed by the electric automobile;
when the electric vehicle is charged in a second charging stage, charging the electric vehicle according to a current limit value determined by a first function, and adjusting the charging of the electric vehicle from the second charging stage to the first charging stage when the duration of time that the charging port temperature is smaller than a third threshold value is longer than a preset duration;
and when the electric vehicle is charged in a third charging stage, charging the electric vehicle according to a current limit value determined by a second function, and adjusting the charging of the electric vehicle from the third charging stage to the second charging stage under the condition that the duration of the charging port temperature being smaller than a fourth threshold value is longer than the preset duration.
6. The method of claim 4 or 5, wherein the first function:
I1＝Im-k1*T；
im is the maximum charging current allowed by the electric automobile, k1 is a first slope, I1 is a current limit value determined by the first function, and T is the charging port temperature;
the second function:
I2＝Im-k2*T；
k2 is the second slope and I2 is the current limit determined by the second function.
7. The method of claim 1, wherein determining that the electric vehicle is permitted to charge when no fault is detected and when the electric vehicle is not in any of the following conditions comprises:
the fault includes: insulation failure, communication loss failure, and high voltage interlock failure;
the state of the electric automobile comprises: the electric automobile is used as a tractor to pull a motor home, and is in maintenance or OTA upgrading.
8. The method of claim 1, wherein detecting and determining in real time by the body controller whether the electric vehicle is charged is completed, comprising:
detecting the battery state of the electric automobile in real time through the automobile body controller;
under the condition that the battery state is full, determining that the electric automobile is charged;
and under the condition that the battery state is not full, determining that the electric automobile is not charged completely.
9. Electric automobile charging device based on mouth temperature charges, its characterized in that includes:
the first detection module is configured to control the electric automobile to park through the electronic parking system under the condition that the charging gun is detected to be inserted into a charging port of the electric automobile through the vehicle-mounted charger, wherein the vehicle-mounted charger, the electronic parking system and the automobile body controller are all arranged on the electric automobile;
the judging module is configured to judge whether the electric automobile is allowed to be charged or not under the condition that the electric automobile is parked;
a determining module configured to detect a charging port temperature by a temperature sensor provided on the charging port and determine a current limit value for each charging stage based on the charging port temperature when it is determined that the electric vehicle is permitted to be charged;
the charging module is configured to charge the electric automobile in multiple steps comprising a plurality of charging stages according to the current limit value of each charging stage;
and the second detection module is configured to detect and judge whether the electric automobile is charged or not in real time through the automobile body controller.
10. An electric vehicle, characterized by comprising a memory, a main control module and a computer program stored in the memory and executable on the main control module, the main control module implementing the method according to any of claims 1 to 8 when executing the computer program.
CN202310615874.7A 2023-05-29 2023-05-29 Electric vehicle charging method and device based on charging port temperature and electric vehicle Pending CN116552279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310615874.7A CN116552279A (en) 2023-05-29 2023-05-29 Electric vehicle charging method and device based on charging port temperature and electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310615874.7A CN116552279A (en) 2023-05-29 2023-05-29 Electric vehicle charging method and device based on charging port temperature and electric vehicle

Publications (1)

Publication Number Publication Date
CN116552279A true CN116552279A (en) 2023-08-08

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